WiFi/Xfi (DS 10/24/18)(IS 10/2018) Flashcards
A network where devices are connected to each other and shared resources using radio signals that conform to a common standard.
Wireless Networks
The most common wireless standard in use
WiFi (802.11)
Who governs the WiFi standards
(IEEE) the Institute of Electrical and Electronics Engineers
Links two or more devices within a single building or location using a wireless distribution method, providing a connection through an access point to the Internet.
Wireless Local Area Networks (LAN)
Connects different LANs together. They interconnect buildings and cities together. The cover large areas such as towns and cities.
Wireless Wide Area Networks (WAN)
These replace wires and cables of wired networks
Radio transmitters and receivers
The commonly used different WiFi modes.
- 11a
- 11b
- 11g
- 11n
- 11ac
WiFi frequencies or bands
2.4 GHz, 5 GHz
What is the theoretical maximum throughput for 802.11a and on what frequency
54 Mbps on 5GHz
What is the theoretical maximum throughput for 802.11b and on what frequency
11 Mbps on 2.4 GHz
What is the theoretical maximum throughput for 802.11g and on what frequency
54 Mbps on 2.4 GHz
What is the theoretical maximum throughput for 802.11n and on what frequency
300 Mbps on 2.4 or 600 Mbps on 5 GHz
What is the theoretical maximum throughput for 802.11ac and on what frequency
450 Mbps on 2.4 GHz
1300 Mbps on 5 GHz
Radio transmissions over this WiFi mode allows communication at speeds over one gigabit per second
802.11ac
What Technologies are used in WOH
MoCa, Ethernet, WiFi, Homeplug
The two types of Dual Band Networks
Simultaneous/Concurrent, Selectable/Non-Concurrent
What WiFi Physical Barriers Interference level is Medium
Water Bricks Marble
What WiFi Physical Barriers Interference level is High
Concrete Metal
This default Encryption setting provides compatibility with most clients choosing the highest security mode for each client based on its capabilities
WPA/WPA2-PSK (TKIP/AES)
Wireless Camera, Alarm Systems, Digital Baby Monitors, Wireless audio or audio/video devices, Radar, Perimeter Sensors
Typical RF interference sources for 5 GHz band
HomePlug Certified adapters are capable of what bandwidth
200Mbps, 500Mbps and now over 1Gbps.
The app allows a customer to draw a rough floor plan of their home and ping from the app in different areas of the home to generate a heat map of the home.
Telstra WiFi-Maximiser
Enables the technician to perform a quick speedtest as well as exploring WiFi sweet spots throughout the home
CloudCheck
What is the ideal placement position for a wireless gateway
Central Location Elevated position An open area (avoid closets, filing cabinets, basements, and other tight spaces which weaken the WiFi signals)
Simultaneous/Concurrent
2.4 GHz and 5 GHz networks used at same time
Selective/Non-Concurrent
Choose which frequency band, you can only use 1 at a time
Benefit of using 2.4 GHz
Better wifi range
benefits of using 5 GHz
faster speed, less wifi interference
When a wireless Gateway determines which band is most optimal for a Customer’s WiFi connection based on signal strength and WFi Congestion thresholds.
Band Steering
What is an ISP
internet service provider
Three things needed for wireless internet
an ISP, configured wireless delivery capable equipment, wifi capable devices
A device that connects routers or computers to the internet through a cable
Modem
A device that transmits a wireless signal & connects devices to each other & the internet through a wired connection to the modem
Wireless Router
A device that functions as both a modem and a router
Wireless Gateway
The area in which a wireless-capable device can pick up the wireless signal & connect to the wireless network.
Signal Range
A group of devices connected to each other & to the Internet without cables.
Wireless Network
The online site used to view & change the settings of a router & wireless network.
Administration Site (GUI)
The login information used to access the administration site.
router user name and password
The name of a wireless network.
Network Name (SSID)
The password used to connect to a wireless network.
Network Password (key)
SSID
Service Set Identifier
Devices are required to be certified WPA2 since when.
2006
This makes it possible for a customer to access WiFi even when they’re away from home.
Xfinity WiFi hotspots
